200 In stock
Finished Amplifier PCBA Board
Tube Amplifier PCBA 300B Stereo Power Stage 6SN7 Preamp 5U4G Rectifier No Including Tubes HIFI Audio DIY
Model No: WHFT-A300B
A lot of HIFI audiophiles like to do DIY 300B tube amplifier with scaffold-soldering way previously, but that is a great engineering and too much wiring, reliability and performance may be affected, also its appearance does not look good. Now, there are well-made PCBA instead of scaffolding soldering, the problems above will be completely resolved, and it is not difficulties since then. Because the PCBA board is free testing, and its manufacturing difficulties is equal to assemble a LM1875 amplifier
Framework of 300B tube amplifier kit adopts 6SN7 plus 300 B single-ended outputs. And this 300B PCB material is 2.0 thick double copper immersions gold. Output transformers are made of high-grade silicon steel plate Z11, and used imported electronic vacuum tubes.
1. Designed with tube 6SN7 + 300B single-ended output form, the most authentic classic 300B solution.
2. PCB with 2.0mm thick high-quality immersion gold.
3. High SNR, quiet background
4. Circuit is free debugging, making simple.
5. High quality component and parts are used, all are new parts. Coupling capacitor used the best human voice French SCR Suren one; tube bases of 300B are made of 95 ceramic base with special 24K gold-plate contacts, to ensure the PCBA achieving perfect performance, detailed see the BOM.
1. PCB size(L * W * T): 203mm * 107.2mm * 2mm
2. Components and parts included, refer to the BOM
3. Recommend specification of power transformer:
a) Output power: 250W
b) Input: 220V/50Hz
4. Recommend specification of power transformer:
a) Primary impedance (kilohms): 3.5K (200mA) or 2.5K, it is made of taps with linear
b) Secondary (Ohms): 0 - 4 - 8
c) Frequency: 20-30K Hz (-2dB)
5. Recommend specification of Choke Coil: 5-8H
6. Recommend vacuum tubes
a) PSVANE HIFI version 300B tube x 2
b) Russia EH 5U4G EH rectifier tube x 1
c) Russia EH 6SN7 EH tubes x 1
7. Connection diagram
8. Circuit diagram
Note: This 300B tube kits doesn’t contain the required five vacuum tubes and transformers (output transformers, power transformers) and chokes.
Empty PCB Board
Photo for 300B Finished with Casing
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